The first collection of the all-ages comic sensation based on the Cartoon Network animated series. A monster living under the park that lives off of unruly energy?! Arm Wrestling training? Mordecai and Rigby are always up to something

The first collection of the all-ages comic sensation based on the Cartoon Network animated series. A monster living under the park that lives off of unruly energy?! Arm Wrestling training? Mordecai and Rigby are always up to something